MOR Bite

Siebel Dinosaur Complex

One of the largest collections of dinosaur fossils in the world

MOR Bite

Siebel Dinosaur Complex

One of the largest collections of dinosaur fossils in the world

Siebel Dinosaur Complex

Museum of the Rockies (MOR) in Bozeman, Montana is a center of active research and exploration into the ancient past. Fossils have been found across much of Montana and the paleontology department at MOR is dedicated to researching the deep past of the state and surrounding regions. Within the museum’s walls is one of the largest collections of North American dinosaurs in the world, including many examples of the gigantic carnivorous Tyrannosaurus rex and a growth series of the horned Triceratops which ranges from juveniles to giants.

Many of these fossils are on display in the museum’s Siebel Dinosaur Complex, where visitors can view Montana’s T.rex, one of the few mounted Tyrannosaurus rex skeletons in the United States, the bones of Big Al, a nearly complete Allosaurus that lived during the Jurassic Period, numerous dinosaur eggs and babies, and more. In addition to dinosaurs, the museum contains a large collection of prehistoric mammals that once roamed the state, including mammoths, rhinos, and bone-crushing dogs. These fossils and more are on exhibit in the museum’s Cenozoic Corridor.

Visitors to the museum can see fossil preparators at work in the Bowman Dinosaur Viewing Lab where they carefully remove the rock that has encased fossils for millions of years so that the specimens can be studied. Every day, new discoveries are being made at MOR. Each year the paleontology field crew sets off into the rocky outcrops of the Treasure State in order to collect more information about what the world was like millions of years ago and how it and the creatures that have inhabited it have changed through time.

Landforms/Lifeforms Exhibit
All life is interconnected. Travel through the time and view creatures that roamed the Earth long before the first dinosaur.

Hall of Giants
View scientific discoveries about some of the largest dinosaurs to roam Montana and the animals that fed on them!

See Big Al, one of the most complete Allosaurus ever discovered, whose skeleton records evidence of a tough life.

Meet Deinonychus, a North American cousin of Velociraptor, and examine the evidence for how this carnivore may have hunted.

Meet Oryctodromeus, a dinosaur that dug burrows and cared for its young inside its dens.

Oceans in Montana: Dip under the surface of the vast seaway that covered much of North America during the Age of Dinosaurs and encounter carnivorous marine reptiles.

Up in the viewing area, meet some mammals that appeared in Montana after the Age of Dinosaurs.

Mesozoic Media Center
Enjoy images and video of the study of paleontology in Montana as well as a showcase of high-resolution histology images taken in the museum’s Paleohistology Laboratory.

Hall of Growth and Behavior
View some of the most famous dinosaur fossil discoveries in Montana including dinosaur eggs and babies. Meet Maiasaura, the state fossil of Montana!

Hall of Horns & Teeth
Enter the world of the Hell Creek Formation and meet some of the last non-avian dinosaurs to roam Montana, including Triceratops and Tyrannosaurus rex!

Tyrant Kings Exhibit - Come face to face with a world-class T. rex fossil collection including the largest and smallest skulls ever discovered! Explore what this famous dinosaur ate and how it lived. Tyrannosaurus rex, meaning “tyrant lizard king,” roamed the earth 65 million years ago. Now among only a handful of museums in the world to display a fossilized T. rex skeleton, this exhibit presents one of the most spectacular specimens ever unearthed – called Montana’s T. rex. Discovered near the Fort Peck Dam and one of the most complete T. rex skeletons ever found, Montana’s T. rex stands 12 feet tall and approximately 40 feet from nose to tail. It would have weighed almost seven tons as it walked the eastern regions of the state. The Tyrant Kings, featuring Montana’s T. rex presents the science and research of Tyrannosaurus rex in a very, very big way.

Triceratops Exhibit - One of the largest collections of Triceratops reveals how this animal grew and evolved.

Cenozoic Corridor
Sixty-six million years ago, a mass extinction event ended the reign of the non-avian dinosaurs and brought the Mesozoic Era to an end. This marked the beginning of the Cenozoic Era, a time when mammals, a group of animals that had lived in the shadows of the dinosaurs for over 100 million years, came to dominate the Earth. The new Cenozoic Corridor at MOR highlights the fossils of mammals and other creatures that roamed Montana after the ‘Age of Reptiles’, including ancient horses, bison, mammoth, rhinoceros, and a bone-crushing dog.